Lace-making machine.



'G. KRENZLER. LAc'E MAKING MACHINE APPLICATION FILED 13110.20, 1909.

979,770. 1 Patnted Dec. 2 1910.-

-- rm: nmmurysn-Rs 5a., rumpus-roar. mcl

GUSTAV KRENZLER, OF BARIVIEN, GERMANY.

LACE-MAKING MACHINE.

Specification of Letters Patent.

Patented Dec. 27, 1910.

Application filed December 20, 1909. Serial No. 534,061.

To all whom 'it may concern:

Be it known that I, GUSTAV KRENZLER, a subject of the German Emperor,and residing at Barmen, Germany, have invented certain new and usefulImprovements in Lace-Making Machines, of which the following is aspecification.

My invention relates to lace-making machines in which the number ofbobbin carriers is equal to the number of heads or plates, so that eachplate corresponds to one bobbin carrier. In these machines, the bobbinsnever operate on two immediately adjacent or contiguous plates. Eithertwo bobbins run on one plate, in which eventthe threads from thesebobbins twist around one another, or the bobbins of these plates aretransferred to the adjacent plates when each operates with anotherbobbin. The bobbins which are not working are stopped on the plates bythe rotation of the drivers being interrupted by means of the patterngear of the jacquard mechanism, and this interruption takes place alwaysonly when the drivers occupy one definite position. Further, in thesemachines the drivers, or the plates formed as drivers, are so arrangedthat one driver enters into the path of the adjacent driver and therecesses in the drivers are so proportioned and shaped that each of twoadjacent drivers can drive the bobbin carrier between the two and thusleave one bobbin on the same plate or transfer it to the next, asdesired, according in each instance as to whether the one or the otherdriver is rotated.

Now a primary object of my invention is to provide a device forlace-making machines of the type described above for securely holdingthe stopped drivers in the rest or dwell position, as it frequentlyhappens in the mentioned machines that an operative, z. e. rotating,plate drives the adjacent plate which is to remain at rest, when ofcourse the operation of the machine is disturbed.

One illustrative embodiment of my invention is represented by way ofexample as applied to a lace-making machine of the described type, inwhich the plates themselves are formed as drivers, in the accompanyingdrawing, wherein Figure 1 is a top plan view showing a portion of themachine with the drivers in one position, Fig. 2 a vertical section inthe plane A B in Fig. 1, Fig. 3 a top plan view showing a portion of themachine with the drivers in another position, and Fig. 4 is a verticalsection in the plane C.D in Fig. 3 showing the clutch partiallydisconnected; Fig. 5 is a like section showing the clutch entirelyconnected, and Fig. 6 is a horizontal section in the plane EF in Fig. 5.

Referring to the drawing, the heads or plates at are revoluble in thetop frame-plate b and serve simultaneously as drivers for the bobbincarriers 0; each driver rotates on the wheel spindle (Z secured in thebottom frame-plate e of the machine. In Fig. 1 the drivers are all shownin that position which they occupy when they are to be stopped; in Fig.3 the first, third and fifth plates are operating, whereas the secondand fourth plates are in the rest positions. On this spindle runs pinionor gear wheel f whose hub f is formed as one half of a clutch. The otherhalf f, of the clutch is axially displaceable on a key on huba of drivera, and in a groove 2' turned into this half engages a fork Z1 secured onpin Z mounted movable vertically in the top and bottom frame plates ofthe machine. The fork and with it the half f, of the clutch areconstantly pressed upwardly by a spring m and the half 7, of the clutchis thereby kept out of engagement with the half 7",.

At its bottom end pin 1 is pivotally connected with one arm of anglelever n whose other arm is connected by a tie rod 8 with the jacquardapparatus. When the appertaining lifting-wire is lifted, the half f, ofthe clutch is moved downwardly whereby this is brought into engagementwith the other half of the clutch and the drivers a are rotated. But ifthe lifting-wire falls from the lifting-blade, owing to the pressure ofspring m the half f, of the clutch moves upward and the clutch isdisengaged. Now in order that the drivers a may be stopped and heldabsolutely certainly in their rest position, I provide on fork is a pinp which abuts, in the elevated position of fork 70, against the bottomface of a driver a and snaps into a hole 0 of the same after the driverhas subsequently rotated a small amount.

The jacquard machine is so adjusted that the lifting-wire falls downsomewhat before the hole 0 arrives over-the pin 79. Then, although thedisplaceable half of the clutch is released by the fallen lifting-wire,the half f, of the clutch remains a short time in engagement because thepin 39 abuts against and is retained by the plate or driver a, so thatthe plate or the drivers 64 ale driven farther and thereby always arriveinto the correct position for the pin 39 to snap in. The small partialrotation of'the driver after the fall of the lifting-wire is ofimportance because the entire disengagement of the clutch and with itthe stoppageand securing of the driver always occur exactly in adefinite position of the bobbin carrier relatively to the moving parts,so that it is impossible for the drivers or bobbin carriers to collide.The hole 0 is somewhat countersunk at its bottom end whereby thesnapping in of pin 32 is assured. In order to check the rotation of thedrivers and secure them additionally in a corresponding position of thesame, I may provide in addition a fixed stop 9 in the drivers, forcoacting with the arm carrying pin 19 or with fork is.

I claim The combination, in a lace-making machine, of a spindle carryinga driver having a hole therein, a driving clutch-member freely revolubleon said spindle, a gear connected with said clutch-member, a drivenclutch-member slidable axially on, but nonrevoluble on, said spindle,and upwardly spring-pressed arresting means actuated by pattern gear andcomprising a forked memher for actuating said driven clutch-mem her tobring the same into and out of engagement with said drivingclutch-member, said forked member carrylng a pin under said driveradapted to enter into said hole in the driver when said clutch-membersare dlsengaged and thereby positively secure the driver in its restposition.

In testimony whereof, I atfix my signature in the presence of twowitnesses.

GUSTAV KRENZLER.

IVitnesses OTTO KoNIG, CI-IAs. J. WRIGHT.

